Thermally affected characterization region by Barkhausen noise

Auteurs :  M. Zergoug, N. Boucherou, A. Haddad, A. Benchaala, B. Moulti, H. Tahraoui, F. SELLIDJ, A. Hammouda
Année : 2000
Domaine : Sciences des matériaux
Type : Article de journal
Revue : Ultrasonics
Résumé en PDF :  (résumé en pdf)
Fulltext en PDF :  (.pdf)
Mots clés : Non-Destructive testing, Barkhausen noise, Fast Fourier transformer, Magnetic field, welding, microstructure

Résumé : 

The controlling of some industrial components require the development of new and particular nondestructive testing techniques. The testing method using Barkhausen noise (BN) is a particular one which can be applied to ferromagnetic materials. It is a magnetic nondestructive evaluation method and can provide very important information about the material structure. The aim of our work is to study the material structure using this technique to characterize the region submitted to thermal processing. Samples of steel have been heated at temperatures between 650°C and 1200°C with variable parameters (time processing, maintenance time, etc.). Acoustic BN processing allows an easy interpretation of results. Micrographs of samples have been obtained to confirm the results obtained by BN.